Merge branch 'vfs' into 'develop-BA-FS26'

implement basic vfs

See merge request teachos/kernel!16

1 files changed, 39 insertions, 0 deletions

diff --git a/kernel/src/filesystem/rootfs/rootfs_inode.cpp b/kernel/src/filesystem/rootfs/rootfs_inode.cpp
new file mode 100644
index 0000000..9bbfbce
--- /dev/null
+++ b/kernel/src/filesystem/rootfs/rootfs_inode.cpp
@@ -0,0 +1,39 @@
+#include "kernel/filesystem/rootfs/rootfs_inode.hpp"
+
+#include "kernel/filesystem/inode.hpp"
+
+#include <kstd/memory>
+#include <kstd/string>
+
+#include <algorithm>
+#include <cstddef>
+#include <string_view>
+#include <utility>
+
+namespace filesystem::rootfs
+{
+  rootfs_inode::rootfs_inode()
+      : inode(inode_kind::directory)
+  {}
+
+  auto rootfs_inode::read(void * /*buffer*/, size_t /*offset*/, size_t /*size*/) const -> size_t
+  {
+    return 0;
+  }
+
+  auto rootfs_inode::write(void const * /*buffer*/, size_t /*offset*/, size_t /*size*/) -> size_t
+  {
+    return 0;
+  }
+
+  auto rootfs_inode::add_child(std::string_view name) -> void
+  {
+    m_children.push_back(std::make_pair(kstd::string{name}, kstd::make_shared<rootfs_inode>()));
+  }
+
+  auto rootfs_inode::lookup_child(std::string_view name) -> kstd::shared_ptr<inode>
+  {
+    auto it = std::ranges::find_if(m_children, [&](auto const & pair) { return pair.first == name; });
+    return (it != m_children.end()) ? it->second : nullptr;
+  }
+}  // namespace filesystem::rootfs